IDAHO (MT)

Fetch! With Ruff Ruffman"The Ol' Shell Game"
Ruff gets a phone call from his friend Crush, the sea turtle from Disney's Finding Nemo, who tells him that his turtle friends are in trouble. Ruff sends Marco and Shreya to Florida to learn about turtles and help turtle hatchlings on the beach. He also sends Jay to be a contestant on a mysterious radio game show, which turns out to be a little unfair. D

5:30 pm

Nightly Business Report
The airlines are filling more seats, and raising ticket prices. Washington Correspondent Sylvia Hall looks at what could be the best summer travel season in years. General Motors Chief Mark Reuss says their new cars will drive profits in 2012. D

Nature"Ocean Giants: Deep Thinkers"
Dolphins and whales have the largest brains of any animals and like humans, have special brain cells called spindle cells that are associated with communication, emotion and heightened social sensitivity. Filmmakers reveal long-term studies about dolphin brains, and then dive with a group of dolphins as the creatures demonstrate how clicks, whistles and synchronized movements and volcalizations establish personal identity and gang behavior. Part 2 of 3G

8:00 pm

NOVA"Hunting The Elements"
David Pogue ("Making Stuff") travels the globe to learn why copper is king, gases are noble and gold is "stand-offish." He spins through a world of weird, extreme chemistry on a quest to unlock the secrets of the 118 unique elements that make up the periodic table - with a few explosions along the way.G

10:00 pm

Ashes to Ashes
Season 2 opens in 1982 with Alex Drake still trapped in the past, still working with DCI Gene Hunt, DS Ray Carling and DC Christ Skelton. They now have a new boss, Detective Superintendent (Supermac) Mackintosh, who is determined to rid the force of police corruption. A man found dead in a Soho strip club turns out to be PC Sean Irvine, and it soon looks like it is murder. The team has to contend with the terrifying possibiity that the killer could be one of their own.G